screen mesh reference

Tools & Tips

SCREEN MESH REFERENCE

When screen cloth is manufactured, the mesh sizes typically do not directly correspond to the US Standard Sieve mesh sizes that are often used for lab or testing purposes. Sweco primarily manufactures two styles of screen cloth, Market Grade (MG) and Tensile Bolt Cloth (TBC).

For a given mesh size, a MG screen will have a thicker wire diameter than a TBC screen. As such, the amount of open screen area in a MG screen is less than a TBC screen. The TBC screen can therefore handle a higher volume, but the MG screen will provide longer life.

Consider a 40 mesh US standard sieve, the opening is 0.0167”″. With an MG screen, the choice is between a 35 mesh screen at 0.0176”″ versus a 40 mesh screen with a 0.0150”″ opening. Note either screen wire diameter is just over 0.01″ diameter with a total screen opening approximately 37%. If a TBC screen is used, the desired opening falls between a 44 and 46 mesh screen. Either of these screens uses a wire diameter half the size of a MG screen, but the total open area is about 57%.

Which screen cloth is best? If the material flows easily, does not blind the screen, and is not abrasive, then TBC screens will handle a higher volume, often resulting in a smaller diameter screener. Otherwise, the MG screen is preferable, as hardto flow and sticky material need screen cleaning systems, so the thicker wire will last longer.

The following is a downloadable file that can help you in determining what will best meet your needs. Read More >>

PORTABLE MIXER INFO GUIDE

Portable mixer selection guide

clamp reference material

The positioning device of the mixer combines a vertical index on the ball of the housing and a horizontal index on the rim of
the clamp socket

The correct position for the mixer will vary in individual cases. Use this table to position the mixer in relation to tank diameter and height for normal applications. In operation, some adjustment of the position may be desirable for best results.

Swirling and vortexing positions may be useful for surface introductions of solids, liquids, or gases. Read More >>